Thor Biltz XR Trail Boots The Thor Blitz XR Trail Boots combine durable synthetic calf overlays with padded mesh interiors and secure injection-molded buckles for breathability, grip, and a snug fit. Integrated shift protection, pre-curved shin plate, and a custom lugged outsole offer superior comfort and protection. Features: Fully synthetic calf overlays deliver durability and optimal grip Padded mesh interior improves breathability Injection molded positive lock buckles Injection molded medial abrasion plate with integrated shift protection 3 fully adjustable straps allow for a custom rider specific fit Injection molded outsole with a steel shank insert Pre-curved injection molded shin plate Custom molded lugged outsole with a steel shank insert